ftp://ftp.cs.umn.edu/pub/blender.org/release/Blender2.37a/blender-2.37a-windows.zip
http://www.blender3d.com/cms/Home.2.0.html

3D Software for Modeling, Animation, Rendering and more 

Blender, the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback (see the features and screenshots). Available for Windows, Linux, Irix, Sun Solaris, FreeBSD or Mac OS X under the GNU Public License. 
Revolutionary non-overlapping and non-blocking UI delivers unsurpassed workflow.  
Flexible and fully configurable window layout with as many screen setups as you prefer . 
Undo support on all levels.  Powerful built-in database system allowing instances, scene management, and dynamic linking multiple project files.   Anti-aliased fonts with international translation support.   Windows for animation curves/keys, outliner, schematic scene diagram, non-linear video sequence editing, character animation action editor, non-linear animation mixer, image/UV editing, file/image selection and file management .  Built-in text editor for annotations and editing Python scripts. 
Blender is being released with source codes under the GNU Public License. 
Blender therefore is fully free to use and distribute within any educational, professional or commercial environment. Artwork created with Blender - including python scripts - is the sole property of the creator. 



Interface
 Revolutionary non-overlapping and non-blocking UI delivers unsurpassed workflow  
 Flexible and fully configurable window layout with as many screen setups as you prefer  
 Undo support on all levels  
 Powerful built-in database system allowing instances, scene management, and dynamic linking multiple project files  
 Anti-aliased fonts with international translation support  
 Windows for animation curves/keys, outliner, schematic scene diagram, non-linear video sequence editing, character animation action editor, non-linear animation mixer, image/UV editing, file/image selection and file management  
 Built-in text editor for annotations and editing Python scripts  
 Consistent interface across all platforms 
Modeling
 A range of 3D object types including polygon meshes, NURBS surfaces, bezier and B-spline curves, metaballs, vector fonts (TrueType, PostScript, OpenType)  
 'Smooth proxy' style catmull-clark subdivision surfaces with optimal iso-lines display and sharpness editing  
 Mesh modeling based on vertex, edge and/or face selection  
 Boolean mesh functions  
 Editing functions such as extrude, bevel, cut, spin, screw, warp, subdivide, noise, smooth Soft selection editing tools for organic modeling  
 Python scripting access for custom tools 
Animation
 Armature (skeleton) deformation with forward/inverse kinematics, auto skinning and interactive 3D paint for vertex weighting  
 Non-linear animation mixer with automated walkcycles along paths  
 Constraint system  
 Vertex key framing for morphing, with controlling sliders  
 Character animation pose editor  
 Animatable lattice deformation  
 'Ipo' system integrates both motion curve and traditional key-frame editing  
 Audio playback, mixing and editing support for sound synchronisation  
 Python scripting access for custom and procedural animation effects